It would seem you've had a hard time with blood meal. I found by experience that blood meal is so easy to use too much, it's just a hard one to figure.
I have used Bone Meal off and on, mostly on, for decades, with great results. Some kinds are rated 1 15 0, and other kinds 5 15 0.
Some years ago I did a test, I decided to check to see how much bone meal a person could use and get the best results. I transplanted Tomato seedlings from 4" pots to gallon pots with various amounts of bone meal, from 0 dose, half dose, full dose, double dose, and on up to a 50 50 mix!
If I recall right, all plants grew at least alright! The potting soil was Coir based. I decided that past a quadruple dose was just a waste.
But realistically, using and applying a dry product in a garden means figuring the directions. I would not want to suggest a double dose for Corn, especially since I did not do the experiment on Corn. But I will say that Bone meal is good stuff, at least for starters.
There are boxed fertilizers by companies such as Whitney designed for vegetable gardens, that are made from several kinds of "meals", with things like Guano in them. I have used those, and I like them. There are brands that also come infused with beneficial microbes. One of those I can't find any more, but the one I really liked was intended for bulbs with that much higher middle number.
Corn Likes that 1st number, so look for one with that 1st number being biggest.
Also, Kelp meal is usually around 0 0 3 plus supplies micro nutrients and some also has natural growth hormones.
Not sure how corn does with fish emulsion but I think that would make a good liquid feed. Always better never to make it stronger than it says.
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Answering a fertilizer question can be hazardous to the one who tries an answer. Never use more than it says. Your soil should be tested in one way or another first also.